Routing in Wireless Sensor Networks (WSNs) is a very challenging task due to the large number of nodes, their mobility and lack of proper infrastructure. Since the sensors are battery powered devices, energy efficiency is considered as one of the main factors in designing routing protocols in WSNs. Most of energy-aware routing protocols are mere energy savers that attempt to decrease the energy...

Sound is a common means to give feedback on mobile devices. Much research has been conducted to examine the learnability and user performance with systems that provide audio feedback. In many cases a training period is necessary to understand the meaning of a specific feedback, because their functional connotation may be ambiguous. Additionally, no standardized evaluation method to measure the ...

1098 Recibido: 05.11.98. Recibido en versión revisada: 01.02.99. Aceptado: 12.02.99. a Departamento de Neurología. Hospital J.M. Ramos Mejía. b Instituto de Química Biológica. Facultad de Farmacia y Bioquímica. Universidad de Buenos Aires. Buenos Aires, Argentina. numerosas. Varios factores de riesgo (modificables y no modificables) han sido implicados y debidamente estratificados. El facINTROD...

Vocabulary is an important component of language proficiency which provides the basis for learners’ performance in other skills. But, since vocabulary learning seems to be so demanding, learners tend to forget newly-learnt words quite soon. In order to identify vocabulary learning conditions which can produce a more lasting effect, this study investigated the effect of three kinds of gloss cond...

We have good reason to believe our best scientific theories, and mathematical entities are indispensable to those theories, so we have good reason to believe in mathematical entities. Mathematics is thus on an ontological par with natural science. Furthermore, the evidence that confirms scientific theories also confirms the required mathematics, so mathematics and science are on an epistemologi...

The availability of extense tagged data corpus is an essential aspect in many NLP tasks. The effort required for tagging manually this large number of phrases has encouraged many researchers like us to create automatic applications for this issue. Our approach represents a completely automatic method (optionally applying a minimum effort) for enlarging an already existing corpus, so it acquires...

This paper offers a review of technological developments regarding massive storage devices and the emergence of new streaming services for audio and video on-demand. While the capacity of storage devices has been increasing exponentially, the price of a stored bit has been falling at an even faster rate. Audio and video files can be stored on-line in personal computers and computer networks. Ac...

A concept and architecture of a personal communication system (PCS) is introduced that integrates audio communication and hearing support for the elderly and hearing-impaired through a personal hearing system (PHS). The concept envisions a central processor connected to audio headsets via a wireless body area network (WBAN). To demonstrate the concept, a prototype PCS is presented that is imple...

Current mobile technology works well to connect individuals together at any time or place. However, general focus on one-to-one conversations has overlooked the potential of always-on group and community links. I hypothesize that asynchronous persistent audio is a superior medium to support scalable always-on group communication for mobile devices. To evaluate this claim, one must first have an...